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Neil
bba32bd00c
Terminals froze app-wide several times daily, needing a manual pkill. libuv unlinks the pathname a server bound to when it closes, with no ownership check, so a departing daemon deleted whichever socket then sat at the canonical path — including a live replacement's. The replacement kept hosting PTYs no client could reach. #12709 fixed that mechanism; this replaces the shape around it. Two invariants: only a daemon publishing itself onto the canonical endpoint may mutate that entry, and only by replacing one it has itself just proven dead; and no actor removes a name it did not create. Publish binds a private name, takes the canonical one with an exclusive link, and on EEXIST proves the incumbent dead by connecting before replacing it in a single rename. Only 'connected' means occupied and only refused/missing prove death — a timeout proves nothing and declines. Deletes the claim sweeper, the reclaim tail of killStaleDaemon, and three unfenced unlinkSync(socketPath) calls in the launcher. Measured: rename exposed no gap across 6,525 darwin / 8,004 linux probes of a live handover, where unlink-then-link gapped on 200 of 200. Verified on all three platforms: full suite on macOS and Linux, and daemon restart e2e on a real windows-2022 host. Contract in src/main/daemon/AGENTS.md.